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SPANNTOP

SPANNTOP®: Systematic clamping outside clamping inside clamping in front of the chuck

02.2007

HAINBUCH. Workholding technology

HAINBUCH manufactures clamping devices. We have been doing it for more than 50 years, and are now in the third generation. The company is headquartered in Germany. Hainbuch has subsidiaries in France, Italy, Sweden, Thailand, and the USA. In addition there are several national and international commercial agencies.

The SPANNTOP system developed by HAINBUCH is a genuine classic. It is extremely easy to handle and convincing in implementation: For example in turning centers and milling centers, on gear cutting machines and grinding machines, or also on rotary transfer machines and friction welding lathes. Wherever rigidity, precision, and ease of change-over are required. This is where the strengths offered by the modular structure really shine.

With SPANNTOP, one fits into the other: With its different adaptations the chuck offers an incredible number of clamping possibilities, which not only optimizes the production process, it also optimizes the balance sheet.

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SPANNTOP. The original

Drawtube adapter

SPANNTOP chuck [pages 4 ­ 11] combi pull-back for chuck elements and bar work combi deadlength for work pieces with short collar modular for bar work

Clamping head [page 12] for clamping of raw material for clamping of finished material machinable to size

Changing fixture [page 13] manual pneumatic pneumatic-hydraulic

MANDO Adapt [page 14] Mandrel-in-SPANNTOP-chuck for I.D. clamping

?

Often copied, never equaled. SPANNTOP is well thought-out in all the details ­ from drawtube adapter to changing fixture. See for yourself: The advantages of the SPANNTOP system rigidity concentric accuracy quick change-over circumferential clamping vibration damping axial draw force against the end-stop

Jaw adapter [page 15] Jaw-clamping-in-SPANNTOP-chuck for clamping in front of the chuck

SPANNTOP . The original

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SPANNTOP. Chuck types

SPANNTOP chuck Combi pull-back

With axial fixed end-stop for chuck elements and a through-bore capacity for bar work. The clamping head pulls the work piece onto the end-stop.

SPANNTOP chuck Combi deadlength

With axial fixed clamping head and end-stop for chuck elements and through-bore capacity for bar work.

SPANNTOP chuck Modular

With a through-bore for bars and tubes.

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SPANNTOP . Chuck types

Circumferential clamping Axial force against the end-stop In particular: Work pieces can also be clamped very short.

Circumferential clamping Radial clamping without axial movement In particular: Work pieces can also be clamped on a short collar or shoulder.

Circumferential clamping

Axial tension

Square, hexagon, special profiles

SPANNTOP . Chuck types

5

SPANNTOP chuck combi pull-back

5 3

When clamping, the clamping head moves axially to the rear, so that the work piece is pulled tightly onto the fixed end-stop. Thus even with the shortest clamping lengths very stable work piece clamping is achieved. Moreover, the segments of the clamping head act like wedges between the work piece and the massive chuck body, and thus ensures rigidity of the entire clamping device, which greatly increases cutting tool life.

SPANNTOP combi pull-back is ideal as through-bore chuck for bar work as end-stop chuck for chuck work with work pieces that have a short clamping length

1 6 4 2

1 flange 2 chuck body 3 clamping head 4 torsional safety 5 mounting threads for front end-stop 6 changeable base end-stop [can be fixed from outside via 3 screws]

The advantages axial draw force against the end-stop, which stabilizes clamping [important for shorter clamping length] little inertia loss extremely rigid optimal holding power simple mechanics, results in better power conversion clamps work pieces with short clamping length converts to a fully functional »bar chuck« when the end-stop plate is removed excellent concentricity after clamping head change [< 0.01 mm]

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SPANNTOP chuck . Combi pull-back

effective clamping forces

Material: Depth of cut: Feed: Cutting speed:

18CrNi8 / 1.5920 approx. 1.0 mm 0.25 mm/U 100 rpm

Significant time savings thanks to fast processing in the SPANNTOP chuck without the use of a center, which is required with a jaw chuck.

chuck

work piece

clamping head end-stop base end-stop

Common-Rail injection nozzle ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ Material: 18CrNi8 / 1.5920 Depth of cut: approx. 1.5 mm Feed: 0.25 mm/U Cutting speed: 100 rpm

Typical clamping and processing examples

Common-Rail

sun shaft

front end-stop

coolant supply is possible for flushing or for air sensing control

depth [end-] stop with/without ejector

SPANNTOP Chuck . Combi pull-back

7

SPANNTOP chuck combi deadlength

3

5

6

For this type the clamping head is coupled in the chuck and there is no axial movement. Tension is introduced through the axial movement of the connecting sleeve. Thus the work piece is clamped radially without axial movement. An interior base end-stop, or a front end-stop mounted on the front side, can be used here as well.

SPANNTOP combi deadlength can be used as through-bore chuck for bar work as end-stop chuck for chuck work for work pieces with a very short collar

1

7

2

4

1 flange 2 chuck body 3 connecting sleeve 4 clamping head 5 torsional safety 6 mounting threads for front end-stop 7 changeable base end-stop [can be fixed from outside via 3 screws]

The advantages radial clamping without axial movement of the clamping head clamps work pieces on a short collar or shoulder converts to a fully functional »bar chuck« when the end-stop plate is removed excellent concentricity after clamping head change [< 0.02 mm]

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SPANNTOP chuck . Combi deadlength

The example shows a situation where the right chuck clamps the part, which is then cut off.

pull-back

deadlength

Typical clamping and processing examples

A work piece with narrow collar must be clamped.

Long work piece is pulled forward several times out of the left chuck and reprocessed. Thanks to radial clamping only the axial clearance to the grooves is better maintained.

short clamping surface

Work piece transfer with narrow collar is an ideal application.

SPANNTOP Chuck . Combi deadlength

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SPANNTOP chuck modular

1

2

6

5

4

3

SPANNTOP modular offers up to 35 % more rigidity and up to 50 % higher clamping forces than conventional collet chucks. The axial tension produced during the clamping process draws the clamping head directly into the chuck body. On the other hand, when using conventional collets the clamping force pushes the chuck away from the spindle nose, which significantly decreases rigidity. With SPANNTOP modular not only work piece clamping is highly stable, but there is also a significant increase of rigidity of the entire clamping fixture. This in turn has a favorable effect on tool life.

The advantage of SPANNTOP relative to traditional clamping collet chucks The clamping force pulls the clamping head to the spindle nose. This has a significant effect on stability.

1 mounting threads [e. g. for guide rings] 2 mounting threads for front end-stop 3 clamping head with pull-back effect 4 chuck body 5 torsional safety 6 flange

SPANNTOP modular can be used as through-bore chuck for bar work The advantages actuating force toward spindle parallel/cylindrical clamping optimal holding power very rigid parallel clamping minimal wear easy change-over concentricity < 0.01 mm

SPANNTOP

compression force drawtube force cutting force

power flow in one direction

Conventional clamping collet chuck

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SPANNTOP chuck . Modular

SPANNTOP. Numbers and facts

Chuck

Size Test length L 32 42 52 65 80 100 125 140 >160 30 30 30 50 50 60 60 60 80 ­­­­­­­­­­­­­­­­­­­­ Attainable concentric precision ­­­­­­­­­­­­­­­­­ ­­­­­­­­­­ Round ­­­­­­­­­­ Modular, pull-back Deadlength < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 ­­­­­­­ Square/hexagon ­­­­­­­ Modular, pull-back < 0.04 < 0.04 < 0.04 < 0.04 < 0.04 < 0.04 < 0.04 < 0.04 Deadlength < 0.06 < 0.06 < 0.06 < 0.06 < 0.06 < 0.06 < 0.06 < 0.06

Clamping range clamping heads

Size --> d.max capacity -> D chuck L S Span range Openingnominal size Minimum clampinglength t Counter bore to max. clamping Ø d Depth t Drawtube force max. RPM* max.

32 BZI 32 BZIG/HSW 42 BZI 42 BZIG/HSW 52 BZI/BZIG/HSW 65 BZI 65 BZIG/HSW 80 BZI/BZIG/HSW 100 BZ/BZG/HSW 120 BZ 125 BZ/BZG/HSW 140 BZ 160 BZ

32 32 42 42 52 65 65 80 100 120 127 140 160

75 75 120 120 125 145 145 160 215 240 250 265 290

47 44 47 42 46 58 53 53 59 61 67 63 63

6 3 9 4 4 9 4 4 0 3 4 5 5

± 0.3 ± 0.3 ± 0.5 ± 0.5 ± 0.5 ± 0.5 ± 0.5 ± 0.5 ± 1.0 ± 1.0 ± 1.0 ± 1.0 ± 1.0

+ 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 2.0 + 1.3 + 2.5 + 1.3 + 1.3

8 mm 5 mm 11mm 6 mm 6 mm 11mm 6 mm 6 mm 2 mm 5 mm 6 mm 7 mm 7 mm

49 49 68 68 64 87 87 93 150 167 166 210

x 6.5 x 6.5 x 10 x 10 x 9 x 10 x 10 x 11 x 18 x 18 x 18 x 12

25 000 N 25 000 N 35 000 N 35 000 N 40 000 N 45 000 N 45 000 N 50 000 N 65 000 N 70 000 N 70 000 N 100 000 N 100 000 N

8000 min. 8000 min. 7000 min. 7000 min. 7000 min. 6000 min. 6000 min. 5500 min. 5000 min. 3200 min. 3200 min. 3200 min. 3200 min.

-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1

117.2 x 20

* Data only applies if the standard clamping head version is used.

SPANNTOP chuck . Numbers and facts

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The clamping head

Standard [in stock]

Special profile clamping possibilities

rigid hardened segments made of chromium-nickel steel all function surfaces are ground in one operation through continuous research and development our vulcanizing process satisfies new market requirements

Modified lead-in-chamfer for square and hexagon bars

Standard versions

Clamping of raw material BZI Serrated with gear tooth system

Clamping of finished material BZIG With smooth clamping surface for clamping on previously processed surfaces

Machinable to size HSW Machining of the clamping bore to size

loading ring

Special versions

F Fine tooth serration for increased grip, e.g. for drawn material

Z Rough tooth serration for increased grip. e.g. for rolled material

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The clamping head

Clamping head change-over

Set-up for ø 60 mm

Remove clamping head

Clean

Insert clamping head

Set-up for ø 65 mm

Our convenient changing fixtures let you change clamping heads in a flash. 1. Manual changes The manually actuated EasyGrip MQ changing fixture is the simplest change-over method. EasyGrip MQQ is especially designed for applications where workspace is tight. 2. Pneumatic changing unit The pneumatically actuated PP changing fixture is absolutely convenient with its comfortable handle and integrated valve button. The PPG pneumatic changing fixture has 2 additional handles. Note: Changing fixtures can be used for any clamping diameter for the relevant clamping head size, regardless of clamping diameter.

chuck

clamping head

changing fixture

MQ

MQQ

PP

PPG

Clamping head change-over 13

MANDO Adapt. Mandrel-in-SPANNTOP-chuck

set-up without alignment

draw bolt

Clamping range

of the mandrel [mm]

Mandrel size

0

This mandrel-in-chuck offers convincing performance, long-lasting power, and unusual speed. It is unsurpassed by any jaw chuck. In terms of the time savings offered by the MANDO Adapt, they do not even come close. A top-class internal clamping fixture. The advantages change from O.D. clamping to I.D. clamping in less than 2 minutes ­ without taking the chuck off the machine high attainable concentricity without alignment [< 0.005 mm] five different mandrel sizes ­ each available for chuck sizes 42 ­ 100

1

2

3

4

42 52 65 80 100 42 52 65 80 100 42 52 65 80 100 65 80 100 65 80 100

ø ø ø ø ø ø ø ø ø ø ø ø ø ø ø ø ø ø ø ø ø

20 20 20 20 20 26 26 26 26 26 36 36 36 36 36 50 50 50 70 70 70

-

28 28 28 28 28 38 38 38 38 38 54 54 54 54 54 80 80 80 100 100 100

Span [mm] ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.35 0.35 0.35 0.40 0.40 0.40

Mount the end-stop blank

Fast and easy change-over

Remove clamping head

Install MANDO Adapt

Mount segment bushing

Screw in draw-bolt

Mount MANDO Adapt on the front side of the SPANNTOP chuck and you are ready to go. The mandrel is then adapted with < 0.005 mm runout. When the draw bolt that is needed

for the actuation of the segmented bushing is screwed on, a slick mechanism will spread and adapt to the coupling that normally grabs the clamping head.

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MANDO Adapt . Mandrel-in-SPANNTOP-chuck

Chuck size

Jaw adapter. Jaw-clamping-in-SPANNTOP-chuck

block jaws for machining

hexagon socket wrench

base end-stop

Chuck size

65

80

Now you can also clamp in front of the chuck with the SPANNTOP combi pull-back with axial bolted base end-stop and the jaw adapter. A combination that opens completely new possibilities that previously needed another jaw chuck. The advantages clamp in front of the chuck ­ without a second clamping setup significantly larger clamping diameters can be realized drilling or milling in-between the jaws chuck jaw with serration, clamping diameter adjustable by 6 mm

Attainable concentric precision at 35 kN measured 50 mm from the front edge of the jaw [in addition to the concentricity of the main clamping unit] Max. permissible jaw machining depth on the jaws Max. permissible jaw machining diameter on the jaws Swing dia. over bed [mm] Jaw height [mm]

0.03 mm

0.03 mm

20 mm

20 mm

120 mm

133 mm

146 mm 39.5 mm

146 mm 39.5 mm

Fast and easy change-over

Remove clamping head

Install base end-stop

Insert jaw adapter

Fixed in place via the central bolt

Jaw ready for machining

A changing fixture is not required when using the jaw adapter. A central mounting screw pulls the support taper onto the base end-stop, and in the process spreads the segments in the chuck

coupling. The support taper prevents the jaw adapter from tipping and thus ensures that it retains its strong clamping force.

Jaw adapter . Jaw-clamping-in-SPANNTOP-chuck

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| Concept and design: ABSICHT AG www.absicht.ag | Photography: Andy Ridder www.andy-ridder.de |

Information

RZ_hb_SPANNTOP_engl

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